Question

JACK borrowed his father's luxury car and promised to return it with a full tank of premium gas , which cost $2.50 per gallon.From experience ,he knows that he needs 15.5 gallons .But he has only $38(and no credit card),which isnt enough.He decides to get as much premium possible to fill the remainder of the tank with regular gas,which costs $2.30 per gallon.How much of each type of gas should he get? @timo86m

Answer 1

2.5*x+2.3y=15.5 I think is the right equation.

Answer 2

1 of them anyways

Answer 3

could you go on further?

Answer 4

2.5*x+2.3y=15.5
x+y=38

Answer 5

2.5*x+2.3y=15.5 for how much gas he needs
x+y=38 for how much cash he has.

Answer 6

can u please work it out for me to see.aint so sure about my answer

Answer 7

2.5*x+2.3y=15.5
x+y=38

just solve by elimination or substitution.

Answer 8

oh okay

Answer 9

thanks

Answer 10

it's easy :)

Answer 11

yeah it is.:-)

Answer 12

think i got it wrong tho

Answer 13

why

Answer 14

2.5*x+2.3y= 38
x+y=15.5

Answer 15

Now it is right :D

Answer 16

oh okay.gonna work it out and see

Answer 17

http://www.wolframalpha.com/input/?i=2.5*x%2B2.3y%3D+38%2C++x%2By%3D15.5

Answer 18

oh ok.i was right then.thanks